M2.5 earthquake 97 km WSW of Ferndale, California

Magnitude

2.5 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, May 4, 1981, 4:40 PM PDT

UTC

1981-05-04 23:40:02 UTC

Depth

4.6 km (2.9 mi), shallow

Epicenter

40.403° N, 125.390° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 10.8 km horizontally, 13.3 km in depth

Magnitude uncertainty

±0.07

Depth from

From location

Station coverage gap

312°, poorly surrounded by stations

Stations used

8

• Ferndale, CaliforniaPopulation 1,369. Forecast97 kmW
• Fortuna, CaliforniaPopulation 12,000. Forecast106 kmWSW
• Chico, CaliforniaPopulation 121,345. Forecast311 kmWNW

After

1. 3.295 km W of Ferndale, CaliforniaMon, May 4, 6:06 PM PDT · 16587 days ago · 8 km deep · 3 km away
2. 3.437 km SW of Ferndale, CaliforniaMon, May 4, 11:03 PM PDT · 16587 days ago · 26 km deep · 72 km away
3. 2.122 km W of Ferndale, CaliforniaThu, May 7, 12:05 PM PDT · 16585 days ago · 21 km deep · 75 km away
4. 3.8131 km W of Ferndale, CaliforniaSat, May 9, 11:11 AM PDT · 16583 days ago · 5 km deep · 40 km away
5. 1.737 km WSW of Ferndale, CaliforniaSat, May 9, 11:22 AM PDT · 16583 days ago · 29 km deep · 63 km away
6. 2.230 km SW of Scotia, CaliforniaSat, May 9, 5:23 PM PDT · 16582 days ago · 18 km deep · 89 km away
7. 1.928 km SW of Ferndale, CaliforniaMon, May 11, 4:20 AM PDT · 16581 days ago · 26 km deep · 74 km away
8. 2.236 km SW of Ferndale, CaliforniaMon, May 11, 5:14 PM PDT · 16580 days ago · 27 km deep · 72 km away
9. 1.629 km SW of Scotia, CaliforniaWed, May 13, 2:16 AM PDT · 16579 days ago · 27 km deep · 89 km away
10. 2.773 km WSW of Ferndale, CaliforniaWed, May 13, 2:35 AM PDT · 16579 days ago · 64 km deep · 25 km away
11. 2.122 km W of Indianola, CaliforniaWed, May 13, 3:15 AM PDT · 16579 days ago · 20 km deep · 82 km away
12. 1.736 km SW of Ferndale, CaliforniaWed, May 13, 9:53 PM PDT · 16578 days ago · 35 km deep · 73 km away
13. 1.729 km SSW of Ferndale, CaliforniaThu, May 14, 10:50 AM PDT · 16578 days ago · 35 km deep · 81 km away
14. 2.425 km SSW of Ferndale, CaliforniaThu, May 14, 3:36 PM PDT · 16577 days ago · 32 km deep · 85 km away
15. 2.378 km WNW of Ferndale, CaliforniaThu, May 14, 3:48 PM PDT · 16577 days ago · 8 km deep · 40 km away
16. 1.625 km SW of Scotia, CaliforniaThu, May 14, 4:11 PM PDT · 16577 days ago · 29 km deep · 88 km away
17. 2.825 km SW of Ferndale, CaliforniaThu, May 14, 7:21 PM PDT · 16577 days ago · 27 km deep · 76 km away
18. 1.634 km SW of Ferndale, CaliforniaFri, May 15, 4:25 PM PDT · 16576 days ago · 23 km deep · 76 km away
19. 1.811 km W of Indianola, CaliforniaFri, May 15, 7:17 PM PDT · 16576 days ago · 12 km deep · 92 km away
20. 2.911 km W of Indianola, CaliforniaFri, May 15, 8:58 PM PDT · 16576 days ago · 11 km deep · 92 km away
21. 1.88 km WNW of Indianola, CaliforniaSun, May 17, 11:08 AM PDT · 16575 days ago · 4 km deep · 96 km away
22. 3.339 km SW of Ferndale, CaliforniaSun, May 17, 10:21 PM PDT · 16574 days ago · 24 km deep · 67 km away
23. 3.338 km SW of Ferndale, CaliforniaSat, May 23, 11:43 AM PDT · 16569 days ago · 27 km deep · 68 km away
24. 3.150 km WSW of Ferndale, CaliforniaMon, May 25, 6:38 AM PDT · 16567 days ago · 34 km deep · 52 km away
25. 4.658 km WSW of Ferndale, CaliforniaTue, May 26, 4:41 AM PDT · 16566 days ago · 2 km deep · 41 km away
26. 3.523 km SSW of Ferndale, CaliforniaTue, May 26, 5:12 AM PDT · 16566 days ago · 27 km deep · 83 km away
27. 2.224 km SW of Ferndale, CaliforniaTue, May 26, 5:20 AM PDT · 16566 days ago · 27 km deep · 79 km away
28. 2.1near the coast of Northern CaliforniaTue, May 26, 7:52 PM PDT · 16565 days ago · 31 km deep · 81 km away
29. 2.873 km WNW of Ferndale, CaliforniaWed, May 27, 2:49 AM PDT · 16565 days ago · 14 km deep · 44 km away
30. 2.341 km SW of Ferndale, CaliforniaWed, May 27, 3:33 AM PDT · 16565 days ago · 21 km deep · 66 km away
31. 2.015 km SSW of Ferndale, CaliforniaWed, May 27, 9:26 AM PDT · 16565 days ago · 28 km deep · 92 km away
32. 2.633 km SW of Ferndale, CaliforniaWed, May 27, 12:12 PM PDT · 16565 days ago · 27 km deep · 75 km away
33. 2.239 km SW of Ferndale, CaliforniaFri, May 29, 2:01 AM PDT · 16563 days ago · 24 km deep · 68 km away
34. 2.843 km SW of Ferndale, CaliforniaFri, May 29, 8:47 AM PDT · 16563 days ago · 21 km deep · 61 km away
35. 2.936 km SW of Ferndale, CaliforniaFri, May 29, 1:58 PM PDT · 16563 days ago · 29 km deep · 72 km away
36. 1.645 km SW of Ferndale, CaliforniaFri, May 29, 11:53 PM PDT · 16562 days ago · 18 km deep · 61 km away
37. 2.464 km SW of Ferndale, CaliforniaMon, Jun 1, 5:52 PM PDT · 16559 days ago · 4 km deep · 47 km away
38. 1.631 km SW of Ferndale, CaliforniaMon, Jun 1, 6:14 PM PDT · 16559 days ago · 34 km deep · 78 km away
39. 2.225 km SW of Ferndale, CaliforniaTue, Jun 2, 7:48 AM PDT · 16559 days ago · 19 km deep · 78 km away
40. 1.737 km SW of Ferndale, CaliforniaTue, Jun 2, 2:15 PM PDT · 16559 days ago · 35 km deep · 73 km away
41. 2.225 km SSW of Ferndale, CaliforniaTue, Jun 2, 9:16 PM PDT · 16558 days ago · 27 km deep · 82 km away
42. 2.342 km SW of Ferndale, CaliforniaWed, Jun 3, 2:45 AM PDT · 16558 days ago · 23 km deep · 64 km away
43. 2.610 km WNW of Fields Landing, CaliforniaWed, Jun 3, 12:25 PM PDT · 16558 days ago · 25 km deep · 99 km away
44. 2.137 km WNW of Ferndale, CaliforniaWed, Jun 3, 4:37 PM PDT · 16557 days ago · 20 km deep · 66 km away
45. 2.240 km WNW of Ferndale, CaliforniaWed, Jun 3, 4:47 PM PDT · 16557 days ago · 19 km deep · 64 km away
46. 2.338 km WNW of Indianola, CaliforniaThu, Jun 4, 3:48 AM PDT · 16557 days ago · 9 km deep · 74 km away
47. 2.236 km SW of Ferndale, CaliforniaThu, Jun 4, 12:33 PM PDT · 16557 days ago · 28 km deep · 74 km away
48. 2.637 km SW of Ferndale, CaliforniaFri, Jun 5, 2:20 PM PDT · 16556 days ago · 28 km deep · 70 km away
49. 2.421 km WNW of Ferndale, CaliforniaSat, Jun 6, 12:25 AM PDT · 16555 days ago · 24 km deep · 80 km away
50. 2.384 km WNW of Samoa, CaliforniaSat, Jun 6, 2:46 PM PDT · 16555 days ago · 4 km deep · 72 km away
51. 1.718 km WSW of Scotia, CaliforniaMon, Jun 8, 1:04 AM PDT · 16553 days ago · 28 km deep · 94 km away
52. 2.414 km WNW of Fields Landing, CaliforniaMon, Jun 8, 3:06 AM PDT · 16553 days ago · 24 km deep · 94 km away
53. 2.314 km SSW of Ferndale, CaliforniaMon, Jun 8, 2:06 PM PDT · 16553 days ago · 23 km deep · 91 km away
54. 1.633 km SSW of Ferndale, CaliforniaMon, Jun 8, 4:44 PM PDT · 16552 days ago · 24 km deep · 78 km away
55. 2.554 km WNW of Samoa, CaliforniaTue, Jun 9, 1:50 PM PDT · 16552 days ago · 14 km deep · 80 km away
56. 3.398 km WSW of Ferndale, CaliforniaTue, Jun 9, 2:34 PM PDT · 16552 days ago · 65 km deep · 9 km away
57. 2.197 km WSW of Ferndale, CaliforniaWed, Jun 10, 1:57 AM PDT · 16551 days ago · 7 km deep · 0 km away
58. 1.812 km WSW of Ferndale, CaliforniaWed, Jun 10, 6:27 AM PDT · 16551 days ago · 16 km deep · 85 km away
59. 3.3106 km W of Trinidad, CaliforniaWed, Jun 10, 2:48 PM PDT · 16551 days ago · 11 km deep · 75 km away
60. 2.3111 km W of Ferndale, CaliforniaThu, Jun 11, 12:54 AM PDT · 16550 days ago · 4 km deep · 15 km away

The first 60 of 120.

Before

1. 2.230 km WSW of Ferndale, CaliforniaSun, May 3, 10:59 AM PDT · 16589 days ago · 23 km deep · 68 km away
2. 1.522 km SSW of Ferndale, CaliforniaSun, May 3, 8:27 AM PDT · 16589 days ago · 21 km deep · 88 km away
3. 2.434 km SW of Ferndale, CaliforniaSun, May 3, 5:30 AM PDT · 16589 days ago · 28 km deep · 74 km away
4. 1.914 km WSW of Ferndale, CaliforniaSat, May 2, 10:50 AM PDT · 16590 days ago · 19 km deep · 84 km away
5. 1.811 km SW of Ferndale, CaliforniaFri, May 1, 11:07 AM PDT · 16591 days ago · 25 km deep · 87 km away
6. 1.642 km SW of Ferndale, CaliforniaWed, Apr 29, 11:16 PM PDT · 16592 days ago · 25 km deep · 66 km away
7. 2.1125 km W of Ferndale, CaliforniaWed, Apr 29, 10:43 PM PDT · 16592 days ago · 5 km deep · 29 km away
8. 1.737 km SW of Ferndale, CaliforniaTue, Apr 28, 11:20 PM PDT · 16593 days ago · 31 km deep · 73 km away
9. 1.745 km WNW of Shelter Cove, CaliforniaMon, Apr 27, 2:44 AM PDT · 16595 days ago · 5 km deep · 75 km away
10. 1.67 km S of Ferndale, CaliforniaMon, Apr 27, 12:18 AM PDT · 16595 days ago · 17 km deep · 95 km away
11. 1.8near the coast of Northern CaliforniaSun, Apr 26, 7:55 PM PDT · 16595 days ago · 8 km deep · 52 km away
12. 2.226 km WSW of Ferndale, CaliforniaSun, Apr 26, 7:52 PM PDT · 16595 days ago · 26 km deep · 73 km away
13. 1.939 km WSW of Ferndale, CaliforniaSat, Apr 25, 4:57 PM PST · 16596 days ago · 15 km deep · 58 km away
14. 1.885 km W of Big Lagoon, CaliforniaSat, Apr 25, 12:53 PM PST · 16597 days ago · 5 km deep · 90 km away
15. 1.9115 km W of Ferndale, CaliforniaFri, Apr 24, 4:58 PM PST · 16597 days ago · 4 km deep · 18 km away
16. 2.022 km WSW of Ferndale, CaliforniaFri, Apr 24, 11:10 AM PST · 16598 days ago · 24 km deep · 77 km away
17. 1.938 km SW of Ferndale, CaliforniaFri, Apr 24, 9:59 AM PST · 16598 days ago · 25 km deep · 67 km away
18. 2.428 km SW of Ferndale, CaliforniaThu, Apr 23, 8:22 AM PST · 16599 days ago · 18 km deep · 78 km away
19. 2.038 km SW of Ferndale, CaliforniaThu, Apr 23, 5:40 AM PST · 16599 days ago · 21 km deep · 68 km away
20. 2.144 km SW of Ferndale, CaliforniaThu, Apr 23, 12:50 AM PST · 16599 days ago · 18 km deep · 61 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1063312. Read Sat, Oct 3, 2026, 9:29 AM UTC.